A JADX plugin that detects likely encoded string constants during decompilation and annotates them with decoded comments inline.
Base64 string detection — scans string constants in method bodies, and field initializers. When a string looks to be Base64 encoded, a // b64: <decoded> comment is added next to it.
Byte array string detection — scans byte[] and int[] fields initialised with literal arrays. The values are treated as bytes and decoded as UTF-8; if the result has enough printable characters, a // bytes: "<string>" comment is added.
In jadx-gui: Plugins → Install plugin and enter the location id:
github:nklapste:jadx-string-decoder
In jadx-cli:
jadx plugins --install "github:nklapste:jadx-string-decoder"// b64: Hello, World!privatestaticfinalStringENCODED = "SGVsbG8sIFdvcmxkIQ==";
voidexample() {
decode(newString[]{"eHBvc2Vk", "ZnJpZGE=", "Z3Vt"}); //// b64[0]: xposed// b64[1]: frida// b64[2]: gum
}
// bytes: "Hello, World!"privatestaticfinalbyte[] MSG = {72, 101, 108, 108, 111, 44, 32, 87, 111, 114, 108, 100, 33};
// bytes: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"privatestaticfinalint[] BASE64_ENCODE_TABLE = {65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, ...};